dbramley, I see from your profile "large format photography". So I would guess you'd like lots of pixels.
Buying right now, with cash no object:
D70 in a Subal housing. The D70 has a reasonable rez in pixels, great sync speeds (faster than the strobes can provide) and a good feature set. The Subal has their huge viewfinder that gives an image that reminds one of a Sportsfinder on a film camera. (the squinty viewfinder has been my biggest gripe for digital)
Strobes, I am an Ikelite fan for robustness. Also, a good housing tech could shoehorn in the Ikelite TTL subsystem for the D70 when it appears...remember, money no object...
Willing to wait 6 months:
Wait for the DX2 and a housing to match. Same strobe reccomendations unless something changes.
HOWEVER:
You said price is no object. I'd consider this, in light of your background:
Housing: Aquatica 67
Body: Mamiya RZ67 Pro
Back: Phase One P25 (22 megapixel back)
...not that I've been dreamin', or anything...
All the best, James
PS...for someone with an "investment" in Nikon lenses, when $ are a concern, my "right now" reccomendation is still a D70 inside an Aquatica, or, Subal.